Participation is open to all voters who wish to participate as Democrats. Voter registration ends 30 days before the Primary and voters affiliate with the Democratic Party by either voting in the Democratic Primary or signing an affidavit of affiliation.

Tuesday 1 March 2016: Tier 1. 222 of 251 delegates to the Democratic National Convention are pledged to presidential contenders based on the results of the voting in today's Texas Presidential Primary. A mandatory 15 percent threshold is required in order for a presidential contender to be pledged National Convention delegates at either the congressional district or statewide level. How the Democratic Proportional Delegate Allocation Math works.

145 district delegates are to be pledged proportionally to presidential contenders based on the primary results in each of the State's 31 Senatorial Districts. Texas has 145 district delegates apportioned among its 31 STATE SENATORIAL DISTRICTS [unlike most states- as well as the Texas Republican Party- Texas Democrats are NOT using the state's Congressional Districts as a basis of National Convention delegate allocation] as follows: (SD= "Senatorial District")].

77 delegates are to be pledged to presidential contenders based on the primary vote statewide.

These 29 delegates and will go to the Democratic National Convention officially "Unpledged".

10 February 2013: Texas state Senator Dan Patrick (Republican-Houston) has introduced SB 452. This bill would move the statewide and Presidential primaries from the 1st Tuesday in March to the 1st Tuesday in February and the run off from the 4th Tuesday in May to the 4th Tuesday in April..

26 February 2013: Texas state Representative Stephanie Klick (Republican) files HB 1911. The bill changes the general and presidential primary elections from the first Tuesday in March to the first Saturday in March. In addition, the runoff primary changes from the 4th Tuesday to the 4th Saturday in May.

9 February 2015: HB 1214 is introduced by state Representative Lyle Larson (Republican). The bill change the date of the Presidential and partisan primaries from the 1st Tuesday in March to the 4th Tuesday in January.

The state Legislature adjourned on 1 June 2015 without passing any of these bills.

Circa 26 June 2015: The DNC Rules and Bylaws Committee rejected the Texas plan to allocate the state's District delegates by primary and the at-large and Pledged PLEO delegates by caucus. Texas Democratic Party revised its plan to allocate all pledged delegates via the 1 March 2016 primary.

Notes

Primary dates marked "presumably" and polling times marked "reportedly" are based on unofficial or estimated data (especially as regards local variations from a jurisdictionwide statutory and/or regulatory standard) and are, thereby, subject to change.